The human factor in investment decisions is often overlooked, but in reality, it has a profound impact on our behavior. People have an inherent aversion to loss, and the pain of a loss of the same amount far exceeds the pleasure of an equivalent gain. This psychological tendency leads investors to self-deceive when faced with floating losses, believing that "not selling means not really losing"; while in the face of floating profits, they are eager to "lock in profits" to ensure their gains.

The root of this phenomenon lies in the fact that most people's decision-making processes are driven more by emotions than by rationality. Just like knowing that cola is unhealthy yet still drinking it, people often choose options that provide immediate pleasure rather than those that align with their long-term interests.

In the investment field, this emotion-driven decision-making is particularly evident:

1. When faced with paper losses, some investors choose to turn a blind eye, as if ignoring it can lighten their psychological burden.
2. Some people continuously add to their positions, trying to alleviate psychological pressure by lowering the average cost.
3. Some investors stubbornly believe that as long as they do not sell, it does not count as a real loss, and thus refuse to cut their losses.
4. Some people also choose to cut their losses directly. Although it is painful, it allows them to quickly get rid of the burden of negative emotions.
5. In a profitable state, investors often rush to lock in profits, fearing the loss of already obtained gains.

Understanding these psychological tendencies is crucial for improving the quality of investment decisions. We need to be aware that while emotions are an important part of human nature, relying too much on them in investment decisions can lead to irrational behavior.

To overcome these tendencies, investors can try the following methods:

1. Develop a clear investment strategy and profit-taking and stop-loss plan, and strictly adhere to it.
2. Cultivate rational analytical skills and not be swayed by short-term market fluctuations.
3. Regularly review and evaluate investment decisions, learning from mistakes.
4. Maintain a diversified investment portfolio to spread risk.
5. Properly control the scale of investment to avoid making irrational decisions due to excessive pressure.

By understanding and appropriately managing these human factors, investors can better control their behavior and increase the probability of long-term investment success. Remember, successful investing requires not only expertise but also a profound awareness and effective management of one's own psychology.